Expansion-bolt.



C. J. GLEMBNTS.

EXPANSION BOLT. I

APPLIOATION FILED JULY 10,1907.

Patented Jan. 10, 1911.

UNITED STATES PATENT OFFICE.

CHARLES J. CLEMENTS,

OF NEW YORK, N. Y.

EXPANSIONJBOLT.

Application filed July l, 1907.

- Specification of Letters Patent.

Patented J an. 10, 1911.

serial No. 382,997.

T o all whom it may concern.:

Be it known that. I. Cnanmis J. Cnnni'zn'rs, a citizen of tht` United States, and resident ot' the borough ot Brooklyn, county of Kings. oily and State of New York, have invented eel-tain new and useful ln'nlnovenjients in Expansion-lolts, of which the. following is :l sl'neit'ieation aeeonipzlnied by drawings.

This invention relates to expansion bolts for use in stone, hriek work and the like, and the objects of the invention are to improve upon the construction of such devices and render them stronger and more etlieient in use than heretofore.

The invention consists of the expansion bolt substantially as hereinafter fully deseribed and elaini'ed in this specitieation and shown iu the :ueo|np an \jing drawings.

Figure l is a lougitruliual sectional view talteu through an expansion boltelnbtxlyiug the invention; Fig. 2 is a longitaulinal see tional view showing the shell or cartridge expanded; Fig. 3 is an outside View of the, bolt in its shell-or cartridge; Fig. t is adetail side elevation of the shell or cartridge; Fig. 5 is a side view looking at the inside of one-half of the cartridge; Fig. G is anv end view of the cartridge; Fig. 7 is a seetional view of the cartridge on the line. 7 x 'i' of Fig. 4; Fig. 8 is a detail perspective View of the bolt; Fig. 9 is a longitudinal sectional view of one forni of the expansion holt; Fig. 10 is au outside View of Fig. 9; and Fig. 11. is adetail perspertire view of the bolt used in l `igs. 9 and 10.

Referring to the drawings, A and l represent the halves of the longitudinally divided .shell or cartridge for the expansion bolt and C is the bolt'. propel'. shell is provided with a central eireular bore l) as illustrated in Fig. 7, whileeaeh end of' the shell is provided with a rounded oval bore as illustrated in Fig. o in end view. In this instance the rounded oval forni of the bore at each end is produeed by tapering the interior of the halves of the shell at E and F, and preferably this taper is greater at those portions of the. halves of the shell whieh are not; divided than it. is at the divided edges of the'shell. The divided edges of the shell are also provided with beveled jaws G which may, if desired, have the. retaining lugs l-l, although these lugs may he omitted.

The tapered rounded .oval ends E and l" of the longitudinally divided shell forni re- 'lhe divided,-

ceSSeS or seats for the wedge shaped head or nut of the bolt. In Fig. l the bolt C is shown provided with a rounded oval tapered head l provided with the wedges K projectingl through each side and adapted to enter between the beveled jaws G. In the other tapered oval end of thelshell is arranged the tapered rounded oval shapedwedge or collar J also provided with the wedge Shape lugs K adapted to enter between the jaws G at said end of the shell. This collar is preferably provided with a smooth bore to receive the shank of the holt C.

Between the collar J and the plate L adapted to be .secured tto a support is preferably arranged a sleeve O so that when the nut l is screwed up en the end of the bolt C against the plate L, the head I'and collar J will be forced toward eaeh other to expand the longitudinally divided shell or cartridge as illustrated inFig. Q. l

The longitudinally divided shell is preferably provided with a groove Q, adapted to receive a split ring R of spring metal and thereby hold the parts of the shell together nornnlilly. As the head I and collar J are drawu"'to\\'ard eafeh other, the portions A and l of the shell are forced apart hv the aet ion of the wedge shaped lugsl K,and also b r the. wedging action of the oval tapered head l and collar J, the shape. of which conforms to the ovalropening at eaeh end of the shell. As the major axis of the oval reeesses in the. shell grows longer the head I enters farther between the. shell portions and constantly bears against the tapered parts E. The eollar J also constantly bears against the tapered parts F, so that when the shell has been expanded as far as desired, there is a bearing between the shell and all four sides of the. tapered bead I and collar J, thus all'ording a secure and strong construetion which rigidly holds the plate L in posillon.

ln Fig. t) :mother forni of'the expansion bolt is illustrated` iu which the head for the bult is shown iu the forni of a .snaar-threaded nut l', while the. holt C is rprovided with a head (F. and the shank et' the holt is screw-- sides of the head or nut, and collar, but this expansion is due principally to the hearin f of the head or nut, and collar, oii the tapere( sides of the shell. The lugs or win s K aid in keeping the head or nut,'or col ar from turning in the shell, and enable a cartridge form to be obtained. 4

'The tapering oval bore of the shell and the tapering oval head adapted to slide therein are each provided with a coiitimious circumferential curvatiir'e of gradually changing radii in both 'transverse and longitudinal directions. These parts so constructed are economical to manufacture and efficient in operation.

It will be seen that the two members A and B constituting the shell provide at each end of the shell two inclined trough-shaped' bearing surfaces E; and that these troughshaped surfaces receive and roughly fit the head. These trough-shaped bea ring surfaces converge toward the v'middle plane from the point of viev,v of Figs. 1, 3, and E), and are nearly parallel or non-convergent from the point of view of Fig. 5, in order that the head which is fitted to shape thexe hearing surfaces as explained can slide along them without jamming or hindrance, provided that the expansion diie to the wedgiiig action in the proper plane occurs. At the same time the head is guided in 'all directions lat orally hy the bearing surfaces.

I claim and desire to obtain by Letters latent the following:

l. An expansion holt com rising a divided shell having at its ends oval) axes of which are at right angles to the plane of division and which hores taper in respect at least to their major axes in opposite directions and corresponding tapered oral heads which are provided with wedge shaped wings projecting from their minor axes and which wings cooperate with bev eled jaws on the dividcdedges of the shelll and .means for longitudinally .moving -the two heads, whereby in the simultaneous elxpansiori of both ends of the shell the wedge shaped wings may coact with the said beveled jaws and the oval heads coact with the said oval hores throughout the expanding motion.

hores the major' witli'a longitudinal bore havingr oval i1i wardlyy tapered extremities the minor axes of which are in the dividing plane of the shellz and with longitudinally tapered wing- -giiiding recesses in the immediate proximity ,of the said'dividing plane, of a bolt provided with anoval longitudinally tapered head and an oval longitudinally tapered collar.l oppositell disposed with respec't to each ,other'an' respectively fitted to the said oval extremities ofthe bore, and each provided with longitudinally tapered side wings projecting iii -thefdirection of their minoraxes and fitted to thesaid wing-guidingrecesses, and means for forcing the-said head and collar toward eachother whereby `during such operation of the 'lastsaid means the coactin;r surfaces ofithe head and collar and theshell segments remain in substantial contact throughout and bothei'ids of the shell are correspondingly expanded.

3. The combination with a longitudinally divided expansil'ile shell provided with a liore having outwardly flaring oval extremities at both ends the said shell having longitudinally tapered wing-guiding recesses, of a iionrotatahle bolt. arranged to pass through the said shell and having an oval head secured fast thereto1 and fitted to'one of the .ov-al extremities of the hore, the said head oval collar loosely mounted upon the bolt and fitted to the other oval extremity'of the bore; the said collar also-provided with lon- 'gitudinally'ta red side wings fitted to the saidl win -gui ing recesses in the shell, the said bolt ing provided with a screw threaded portion, and a nut fitted to the said screw "threaded po'rtion.

In-testimonywhercof I have 'signed this specification in the presence of two subscribing witnesses.

. CHARLES J. (ELEMENTS.

Witnessesz' y jEow. A. Strunz.

I. B. Moons. 

